Assimp.Mesh.HasTextureCoords C# (CSharp) Метод

        public bool HasTextureCoords(int channelIndex)
        {
            if (channelIndex >= m_texCoords.Length || channelIndex < 0)
                return false;

            List<Vector3D> texCoords = m_texCoords[channelIndex];

            if (texCoords != null)
                return texCoords.Count > 0;

            return false;
        }

        /// <summary>
        /// Gets vertex data from a given <see cref="AssimpMesh"/>.
        /// </summary>
        /// <param name="sceneMesh">The <see cref="AssimpMesh"/> to get vertex information from.</param>
        /// <param name="boneIndexByName">A lookup of bone index by name information.</param>
        /// <returns>An output list of vertices.</returns>
        private Vertex[] GetMeshVertices(AssimpMesh sceneMesh, Dictionary <string, uint> boneIndexByName)
        {
            var positions                = sceneMesh.Vertices;
            var normals                  = sceneMesh.Normals;
            var tangents                 = sceneMesh.Tangents;
            var colors                   = sceneMesh.HasVertexColors(0) ? sceneMesh.VertexColorChannels[0] : null;
            var textureCoordinates       = sceneMesh.HasTextureCoords(0) ? sceneMesh.TextureCoordinateChannels[0] : null;
            var boneWeightsByVertexIndex = GetBoneWeightsByVertexIndex(boneIndexByName, sceneMesh);

            var vertices = new List <Vertex>();

            for (var i = 0; i < positions.Count; i++)
            {
                var position          = positions[i];
                var normal            = normals[i];
                var tangent           = tangents[i];
                var color             = colors?[i];
                var textureCoordinate = textureCoordinates?[i];
                TryGetBoneIndicesAndWeights(boneWeightsByVertexIndex, i, out var boneIndices, out var boneWeights);

                vertices.Add(new Vertex(new Vector3(position.X, position.Y, position.Z),
                                        new Vector3(normal.X, normal.Y, normal.Z),
                                        new Vector3(tangent.X, tangent.Y, tangent.Z),
                                        color != null ? new Color(color.Value.R, color.Value.G, color.Value.B, color.Value.A) : new Color(1.0f, 1.0f, 1.0f, 1.0f),
                                        textureCoordinate != null ? new Vector2(textureCoordinate.Value.X, textureCoordinate.Value.Y) : Vector2.Zero,
                                        new ReadOnlyCollection <uint>(boneIndices),
                                        new ReadOnlyCollection <float>(boneWeights)));
            }

            return(vertices.ToArray());
        }